CVE-2018-25309: MyBB Recent threads 17.0 Persistent Cross-Site Scripting

Published Apr 29, 2026

Updated

MyBB Recent threads 17.0 contains a persistent cross-site scripting vulnerability that allows attackers to inject malicious scripts by creating threads with crafted subject lines. Attackers can create threads with script tags in the subject parameter to execute arbitrary JavaScript in the browsers of all users viewing the index page.

Affected Software

2 affected components

MyBB Recent Threads=17.0

Dragonexpert Recent Threads On Index Mybb=17.0

Event History

Apr 29, 2026

CVE Published

via MITRE·07:24 PM

Data Sourced

via MITRE·07:24 PM

DescriptionSeverityWeakness

Data Sourced

via NVD·08:16 PM

DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

What is the severity of CVE-2018-25309?

CVE-2018-25309 is classified as a medium severity vulnerability due to its potential impact on user security through persistent cross-site scripting.

How do I fix CVE-2018-25309?

To fix CVE-2018-25309, it's recommended to update to the latest version of MyBB Recent Threads that addresses this cross-site scripting vulnerability.

Which versions of MyBB Recent Threads are affected by CVE-2018-25309?

CVE-2018-25309 affects MyBB Recent Threads version 17.0.

What type of vulnerability is CVE-2018-25309?

CVE-2018-25309 is a persistent cross-site scripting (XSS) vulnerability.

Can attackers exploit CVE-2018-25309 without user interaction?

Yes, attackers can exploit CVE-2018-25309 by creating threads with malicious scripts that are stored and executed without user interaction.